linux-kernel - Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after media change and delay

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Message-ID: <Pine.LNX.4.64.0806221018220.9736@vixen.sonytel.be>
Date:	Sun, 22 Jun 2008 10:18:36 +0200 (CEST)
From:	Geert Uytterhoeven <Geert.Uytterhoeven@...ycom.com>
To:	Alessandro Suardi <alessandro.suardi@...il.com>
cc:	linux-scsi@...r.kernel.org,
	Linux Kernel Development <linux-kernel@...r.kernel.org>,
	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
	Maarten Bressers <mbres@...too.org>,
	Daniel Drake <dsd@...too.org>,
	Cell Broadband Engine OSS Development 
	<cbe-oss-dev@...abs.org>
Subject: Re: [Cbe-oss-dev] [regression/bisected] corrupt CD data after media
 change and delay

On Sat, 21 Jun 2008, Alessandro Suardi wrote:
> On Wed, Jun 18, 2008 at 2:15 PM, Alessandro Suardi
> <alessandro.suardi@...il.com> wrote:
> > On Wed, Jun 18, 2008 at 1:13 PM, Geert Uytterhoeven
> > <Geert.Uytterhoeven@...ycom.com> wrote:
> >> On Wed, 18 Jun 2008, Alessandro Suardi wrote:
> >>> On Fri, Jun 13, 2008 at 7:33 PM, Geert Uytterhoeven
> >>> <Geert.Uytterhoeven@...ycom.com> wrote:
> >>> > On Fri, 6 Jun 2008, Geert Uytterhoeven wrote:
> >>> >> When mounting a CD/DVD more than 30 seconds after inserting it, and reading
> >>> >> from it, we get:
> >>> >
> >>> > Apparently the fix didn't make it to all the CCed lists...
> >>> >
> >>> > http://git.kernel.org/?p=linux%2Fkernel%2Fgit%2Fjejb%2Fscsi-rc-fixes-2.6.git;a=commitdiff_plain;h=d1daeabf0da5bfa1943272ce508e2ba785730bf0
> >>>
> >>> Oh, that's in mainline ? I still have the problem of having to
> >>
> >> Not yet, it's in the scsi-rc-fixes-2.6 tree.
> >>
> >>>  insert DVD / try accessing it and get errors / eject / re-insert
> >>>  and then it magically works... the messages have changed
> >>>  from what they were as reported here
> >>>
> >>> http://bugzilla.kernel.org/show_bug.cgi?id=10116
> >>>
> >>>  (see comments #8 and #9) to these ones, in 2.6.26-rc6-git4:
> >>>
> >>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Result:
> >>> hostbyte=0x00 driverbyte=0x08
> >>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] Sense Key : 0x3 [current]
> >>> Jun 17 22:38:43 sandman kernel: sr 1:0:0:0: [sr0] ASC=0x11 ASCQ=0x0
> >>> Jun 17 22:38:43 sandman kernel: end_request: I/O error, dev sr0, sector 232
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 29
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 30
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 31
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 32
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 33
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 34
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 35
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 36
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 37
> >>> Jun 17 22:38:43 sandman kernel: Buffer I/O error on device sr0, logical block 38
> >>>
> >>> here I eject and reinsert the disc, and:
> >>>
> >>> Jun 17 22:39:10 sandman kernel: UDF-fs: No VRS found
> >>>
> >>>  lo and behold, no problem.
> >>>
> >>> This does not, alas, happen every time. It might be at the first
> >>>  DVD access after booting the laptop, but I haven't investigated
> >>>  in this detail yet.
> >>
> >> Does /sys/block/sr0/size reflect the correct size of the DVD?
> >>
> >> Did you try applying the patch?
> >
> > ATM I'm away from home (as usual), I'll post back when
> >  I have the info you asked for and tried applying the
> >  above patch. Thanks !
> 
> Sigh. I haven't been able to reproduce the problem once since
>  I posted this. Will keep trying...

Perhaps because the fix is now in mainline?

With kind regards,

Geert Uytterhoeven
Software Architect

Sony Techsoft Centre
The Corporate Village · Da Vincilaan 7-D1 · B-1935 Zaventem · Belgium

Phone:    +32 (0)2 700 8453
Fax:      +32 (0)2 700 8622
E-mail:   Geert.Uytterhoeven@...ycom.com
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